Anastigmatic Cassegrain Type Telescope

The author is with Itek Corporation, Lexington, Massachusetts; was done while he was at the Kitt Peak National Observatory, Tucson, Arizona, operated by the Association of Universities for Research in Astronomy, Inc., under contract with the National Science Foundation.

Abstract

The 152-cm telescope of the Cerro Tololo Inter-American Observatory in Chile is to be made to a design producing images that are free of the usual Ritchey-Chrétien astigmatism. A 38-cm diam fused-quartz correcting plate is used to give a field diameter of
1.05, over which images are less than 0.5 sec of arc in diameter.

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